476 lines
10 KiB
C
476 lines
10 KiB
C
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#include <linux/export.h>
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#include <linux/kref.h>
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#include <linux/list.h>
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#include <linux/mutex.h>
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#include <linux/phylink.h>
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#include <linux/rtnetlink.h>
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#include <linux/slab.h>
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#include "sfp.h"
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struct sfp_bus {
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struct kref kref;
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struct list_head node;
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struct device_node *device_node;
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const struct sfp_socket_ops *socket_ops;
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struct device *sfp_dev;
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struct sfp *sfp;
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const struct sfp_upstream_ops *upstream_ops;
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void *upstream;
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struct net_device *netdev;
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struct phy_device *phydev;
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bool registered;
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bool started;
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};
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int sfp_parse_port(struct sfp_bus *bus, const struct sfp_eeprom_id *id,
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unsigned long *support)
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{
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int port;
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/* port is the physical connector, set this from the connector field. */
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switch (id->base.connector) {
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case SFP_CONNECTOR_SC:
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case SFP_CONNECTOR_FIBERJACK:
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case SFP_CONNECTOR_LC:
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case SFP_CONNECTOR_MT_RJ:
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case SFP_CONNECTOR_MU:
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case SFP_CONNECTOR_OPTICAL_PIGTAIL:
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if (support)
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phylink_set(support, FIBRE);
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port = PORT_FIBRE;
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break;
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case SFP_CONNECTOR_RJ45:
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if (support)
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phylink_set(support, TP);
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port = PORT_TP;
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break;
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case SFP_CONNECTOR_UNSPEC:
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if (id->base.e1000_base_t) {
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if (support)
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phylink_set(support, TP);
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port = PORT_TP;
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break;
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}
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/* fallthrough */
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case SFP_CONNECTOR_SG: /* guess */
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case SFP_CONNECTOR_MPO_1X12:
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case SFP_CONNECTOR_MPO_2X16:
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case SFP_CONNECTOR_HSSDC_II:
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case SFP_CONNECTOR_COPPER_PIGTAIL:
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case SFP_CONNECTOR_NOSEPARATE:
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case SFP_CONNECTOR_MXC_2X16:
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port = PORT_OTHER;
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break;
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default:
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dev_warn(bus->sfp_dev, "SFP: unknown connector id 0x%02x\n",
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id->base.connector);
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port = PORT_OTHER;
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break;
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}
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return port;
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}
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EXPORT_SYMBOL_GPL(sfp_parse_port);
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phy_interface_t sfp_parse_interface(struct sfp_bus *bus,
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const struct sfp_eeprom_id *id)
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{
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phy_interface_t iface;
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/* Setting the serdes link mode is guesswork: there's no field in
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* the EEPROM which indicates what mode should be used.
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*
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* If the module wants 64b66b, then it must be >= 10G.
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*
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* If it's a gigabit-only fiber module, it probably does not have
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* a PHY, so switch to 802.3z negotiation mode. Otherwise, switch
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* to SGMII mode (which is required to support non-gigabit speeds).
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*/
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switch (id->base.encoding) {
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case SFP_ENCODING_8472_64B66B:
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iface = PHY_INTERFACE_MODE_10GKR;
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break;
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case SFP_ENCODING_8B10B:
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if (!id->base.e1000_base_t &&
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!id->base.e100_base_lx &&
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!id->base.e100_base_fx)
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iface = PHY_INTERFACE_MODE_1000BASEX;
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else
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iface = PHY_INTERFACE_MODE_SGMII;
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break;
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default:
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iface = PHY_INTERFACE_MODE_NA;
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dev_err(bus->sfp_dev,
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"SFP module encoding does not support 8b10b nor 64b66b\n");
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break;
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}
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return iface;
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}
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EXPORT_SYMBOL_GPL(sfp_parse_interface);
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void sfp_parse_support(struct sfp_bus *bus, const struct sfp_eeprom_id *id,
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unsigned long *support)
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{
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phylink_set(support, Autoneg);
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phylink_set(support, Pause);
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phylink_set(support, Asym_Pause);
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/* Set ethtool support from the compliance fields. */
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if (id->base.e10g_base_sr)
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phylink_set(support, 10000baseSR_Full);
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if (id->base.e10g_base_lr)
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phylink_set(support, 10000baseLR_Full);
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if (id->base.e10g_base_lrm)
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phylink_set(support, 10000baseLRM_Full);
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if (id->base.e10g_base_er)
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phylink_set(support, 10000baseER_Full);
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if (id->base.e1000_base_sx ||
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id->base.e1000_base_lx ||
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id->base.e1000_base_cx)
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phylink_set(support, 1000baseX_Full);
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if (id->base.e1000_base_t) {
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phylink_set(support, 1000baseT_Half);
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phylink_set(support, 1000baseT_Full);
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}
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switch (id->base.extended_cc) {
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case 0x00: /* Unspecified */
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break;
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case 0x02: /* 100Gbase-SR4 or 25Gbase-SR */
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phylink_set(support, 100000baseSR4_Full);
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phylink_set(support, 25000baseSR_Full);
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break;
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case 0x03: /* 100Gbase-LR4 or 25Gbase-LR */
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case 0x04: /* 100Gbase-ER4 or 25Gbase-ER */
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phylink_set(support, 100000baseLR4_ER4_Full);
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break;
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case 0x0b: /* 100Gbase-CR4 or 25Gbase-CR CA-L */
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case 0x0c: /* 25Gbase-CR CA-S */
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case 0x0d: /* 25Gbase-CR CA-N */
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phylink_set(support, 100000baseCR4_Full);
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phylink_set(support, 25000baseCR_Full);
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break;
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default:
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dev_warn(bus->sfp_dev,
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"Unknown/unsupported extended compliance code: 0x%02x\n",
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id->base.extended_cc);
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break;
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}
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/* For fibre channel SFP, derive possible BaseX modes */
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if (id->base.fc_speed_100 ||
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id->base.fc_speed_200 ||
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id->base.fc_speed_400) {
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if (id->base.br_nominal >= 31)
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phylink_set(support, 2500baseX_Full);
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if (id->base.br_nominal >= 12)
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phylink_set(support, 1000baseX_Full);
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}
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switch (id->base.connector) {
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case SFP_CONNECTOR_SC:
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case SFP_CONNECTOR_FIBERJACK:
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case SFP_CONNECTOR_LC:
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case SFP_CONNECTOR_MT_RJ:
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case SFP_CONNECTOR_MU:
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case SFP_CONNECTOR_OPTICAL_PIGTAIL:
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break;
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case SFP_CONNECTOR_UNSPEC:
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if (id->base.e1000_base_t)
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break;
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case SFP_CONNECTOR_SG: /* guess */
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case SFP_CONNECTOR_MPO_1X12:
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case SFP_CONNECTOR_MPO_2X16:
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case SFP_CONNECTOR_HSSDC_II:
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case SFP_CONNECTOR_COPPER_PIGTAIL:
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case SFP_CONNECTOR_NOSEPARATE:
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case SFP_CONNECTOR_MXC_2X16:
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default:
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/* a guess at the supported link modes */
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dev_warn(bus->sfp_dev,
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"Guessing link modes, please report...\n");
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phylink_set(support, 1000baseT_Half);
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phylink_set(support, 1000baseT_Full);
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break;
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}
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}
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EXPORT_SYMBOL_GPL(sfp_parse_support);
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static LIST_HEAD(sfp_buses);
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static DEFINE_MUTEX(sfp_mutex);
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static const struct sfp_upstream_ops *sfp_get_upstream_ops(struct sfp_bus *bus)
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{
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return bus->registered ? bus->upstream_ops : NULL;
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}
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static struct sfp_bus *sfp_bus_get(struct device_node *np)
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{
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struct sfp_bus *sfp, *new, *found = NULL;
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new = kzalloc(sizeof(*new), GFP_KERNEL);
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mutex_lock(&sfp_mutex);
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list_for_each_entry(sfp, &sfp_buses, node) {
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if (sfp->device_node == np) {
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kref_get(&sfp->kref);
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found = sfp;
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break;
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}
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}
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if (!found && new) {
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kref_init(&new->kref);
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new->device_node = np;
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list_add(&new->node, &sfp_buses);
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found = new;
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new = NULL;
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}
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mutex_unlock(&sfp_mutex);
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kfree(new);
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return found;
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}
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static void sfp_bus_release(struct kref *kref) __releases(sfp_mutex)
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{
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struct sfp_bus *bus = container_of(kref, struct sfp_bus, kref);
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list_del(&bus->node);
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mutex_unlock(&sfp_mutex);
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kfree(bus);
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}
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static void sfp_bus_put(struct sfp_bus *bus)
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{
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kref_put_mutex(&bus->kref, sfp_bus_release, &sfp_mutex);
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}
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static int sfp_register_bus(struct sfp_bus *bus)
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{
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const struct sfp_upstream_ops *ops = bus->upstream_ops;
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int ret;
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if (ops) {
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if (ops->link_down)
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ops->link_down(bus->upstream);
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if (ops->connect_phy && bus->phydev) {
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ret = ops->connect_phy(bus->upstream, bus->phydev);
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if (ret)
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return ret;
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}
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}
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if (bus->started)
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bus->socket_ops->start(bus->sfp);
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bus->registered = true;
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return 0;
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}
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static void sfp_unregister_bus(struct sfp_bus *bus)
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{
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const struct sfp_upstream_ops *ops = bus->upstream_ops;
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if (bus->registered) {
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if (bus->started)
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bus->socket_ops->stop(bus->sfp);
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if (bus->phydev && ops && ops->disconnect_phy)
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ops->disconnect_phy(bus->upstream);
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}
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bus->registered = false;
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}
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int sfp_get_module_info(struct sfp_bus *bus, struct ethtool_modinfo *modinfo)
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{
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if (!bus->registered)
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return -ENOIOCTLCMD;
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return bus->socket_ops->module_info(bus->sfp, modinfo);
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}
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EXPORT_SYMBOL_GPL(sfp_get_module_info);
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int sfp_get_module_eeprom(struct sfp_bus *bus, struct ethtool_eeprom *ee,
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u8 *data)
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{
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if (!bus->registered)
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return -ENOIOCTLCMD;
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return bus->socket_ops->module_eeprom(bus->sfp, ee, data);
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}
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EXPORT_SYMBOL_GPL(sfp_get_module_eeprom);
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void sfp_upstream_start(struct sfp_bus *bus)
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{
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if (bus->registered)
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bus->socket_ops->start(bus->sfp);
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bus->started = true;
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}
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EXPORT_SYMBOL_GPL(sfp_upstream_start);
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void sfp_upstream_stop(struct sfp_bus *bus)
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{
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if (bus->registered)
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bus->socket_ops->stop(bus->sfp);
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bus->started = false;
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}
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EXPORT_SYMBOL_GPL(sfp_upstream_stop);
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struct sfp_bus *sfp_register_upstream(struct device_node *np,
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struct net_device *ndev, void *upstream,
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const struct sfp_upstream_ops *ops)
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{
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struct sfp_bus *bus = sfp_bus_get(np);
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int ret = 0;
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if (bus) {
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rtnl_lock();
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bus->upstream_ops = ops;
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bus->upstream = upstream;
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bus->netdev = ndev;
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if (bus->sfp)
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ret = sfp_register_bus(bus);
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rtnl_unlock();
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}
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if (ret) {
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sfp_bus_put(bus);
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bus = NULL;
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}
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return bus;
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}
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EXPORT_SYMBOL_GPL(sfp_register_upstream);
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void sfp_unregister_upstream(struct sfp_bus *bus)
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{
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rtnl_lock();
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sfp_unregister_bus(bus);
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bus->upstream = NULL;
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bus->netdev = NULL;
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rtnl_unlock();
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sfp_bus_put(bus);
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}
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EXPORT_SYMBOL_GPL(sfp_unregister_upstream);
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/* Socket driver entry points */
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int sfp_add_phy(struct sfp_bus *bus, struct phy_device *phydev)
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{
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const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);
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int ret = 0;
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|
|
if (ops && ops->connect_phy)
|
||
|
|
ret = ops->connect_phy(bus->upstream, phydev);
|
||
|
|
|
||
|
|
if (ret == 0)
|
||
|
|
bus->phydev = phydev;
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(sfp_add_phy);
|
||
|
|
|
||
|
|
void sfp_remove_phy(struct sfp_bus *bus)
|
||
|
|
{
|
||
|
|
const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);
|
||
|
|
|
||
|
|
if (ops && ops->disconnect_phy)
|
||
|
|
ops->disconnect_phy(bus->upstream);
|
||
|
|
bus->phydev = NULL;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(sfp_remove_phy);
|
||
|
|
|
||
|
|
|
||
|
|
void sfp_link_up(struct sfp_bus *bus)
|
||
|
|
{
|
||
|
|
const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);
|
||
|
|
|
||
|
|
if (ops && ops->link_up)
|
||
|
|
ops->link_up(bus->upstream);
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(sfp_link_up);
|
||
|
|
|
||
|
|
void sfp_link_down(struct sfp_bus *bus)
|
||
|
|
{
|
||
|
|
const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);
|
||
|
|
|
||
|
|
if (ops && ops->link_down)
|
||
|
|
ops->link_down(bus->upstream);
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(sfp_link_down);
|
||
|
|
|
||
|
|
int sfp_module_insert(struct sfp_bus *bus, const struct sfp_eeprom_id *id)
|
||
|
|
{
|
||
|
|
const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);
|
||
|
|
int ret = 0;
|
||
|
|
|
||
|
|
if (ops && ops->module_insert)
|
||
|
|
ret = ops->module_insert(bus->upstream, id);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(sfp_module_insert);
|
||
|
|
|
||
|
|
void sfp_module_remove(struct sfp_bus *bus)
|
||
|
|
{
|
||
|
|
const struct sfp_upstream_ops *ops = sfp_get_upstream_ops(bus);
|
||
|
|
|
||
|
|
if (ops && ops->module_remove)
|
||
|
|
ops->module_remove(bus->upstream);
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(sfp_module_remove);
|
||
|
|
|
||
|
|
struct sfp_bus *sfp_register_socket(struct device *dev, struct sfp *sfp,
|
||
|
|
const struct sfp_socket_ops *ops)
|
||
|
|
{
|
||
|
|
struct sfp_bus *bus = sfp_bus_get(dev->of_node);
|
||
|
|
int ret = 0;
|
||
|
|
|
||
|
|
if (bus) {
|
||
|
|
rtnl_lock();
|
||
|
|
bus->sfp_dev = dev;
|
||
|
|
bus->sfp = sfp;
|
||
|
|
bus->socket_ops = ops;
|
||
|
|
|
||
|
|
if (bus->netdev)
|
||
|
|
ret = sfp_register_bus(bus);
|
||
|
|
rtnl_unlock();
|
||
|
|
}
|
||
|
|
|
||
|
|
if (ret) {
|
||
|
|
sfp_bus_put(bus);
|
||
|
|
bus = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
return bus;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(sfp_register_socket);
|
||
|
|
|
||
|
|
void sfp_unregister_socket(struct sfp_bus *bus)
|
||
|
|
{
|
||
|
|
rtnl_lock();
|
||
|
|
sfp_unregister_bus(bus);
|
||
|
|
bus->sfp_dev = NULL;
|
||
|
|
bus->sfp = NULL;
|
||
|
|
bus->socket_ops = NULL;
|
||
|
|
rtnl_unlock();
|
||
|
|
|
||
|
|
sfp_bus_put(bus);
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(sfp_unregister_socket);
|